IACS UR S35 Plate Buckling (2023)

IACS UR S35 (2023) provides a consistent methodology for assessing buckling strength of plating in ship structures using recognized classification society requirements.

Available in SDC Verifier with full automation of:

• Section and plate recognition via Panel Finder
• Stress conversion from FEA element results to plate-oriented directions
• Buckling safety factor application for individual loads and load sets

Core Features

• Assessment per Section 3.1 of the standard
• Material strength checks using yield/tensile values
• Support for CSR method to derive equivalent plate dimensions
• Optional manual override for plate thickness input
• Flexible safety factor and averaging configurations

Stress Averaging & Conversion

• Element stresses (Sx, Sy, Txy) are automatically translated into the plate X/Y/XY system
• Option to use plate-averaged stress or element-averaged stress
• Recognizes triangle and quad elements per orientation rules for stress direction

Plate Geometry Recognition

• Length = longest edge of the plate
• Width = longest perpendicular to the length
• Thickness = taken from element unless manually overridden
• Includes dimension-based plots and thickness-based filtering

Buckling results are available as:

• Criteria plots
• Expanded and extreme value tables
• Flow tables across load cases

This implementation is especially useful for hull panels, tank boundaries, and deck structures, ensuring compliance with IACS and class society requirements (e.g., DNV, ABS, LR, BV).